The Albion manager admits that the intensity of her team’s performance dropped after the break, but was left encouraged by the way the players managed the game.
She said, “I’m really pleased with the result. I thought we dominated in the first half and were in control of the game.
“I thought it turned slightly in the second half and took our foot off the gas somewhat. Credit goes to Aston Villa though, because they made it very difficult for us.
“We were hanging on in the end, so credit to our opponents, but the girls should be praised for seeing the game out and getting the result.”
Powell also spoke about Maxime Bennink’s performance on her debut and expressed her delight for Beth Roe, who made her first start of the season after recovering from a long-term knee injury.
“She [Maxime] hasn’t had much playing time for Reading, so we wanted to make sure she came off the bench and got a feel for the game.
“She had a good go, but got muscled off the ball a bit at times. Overall, I am really pleased with the way she fought for the team.
“We were looking at giving Beth 30 minutes, but she felt good and ended up playing for 60. Her contribution was great for someone who hasn’t played that many minutes, and it was brilliant to see her get on the pitch today.”
The fifth round draw will take place at 6.40pm on Monday and will be broadcast live on BBC News' Sportsday programme.
The result means Albion have secured a place in tomorrow’s draw for round five, and the Seagulls boss highlighted the importance of having a good cup run.
“To go through to the next round after a very tough game makes it feel even more rewarding. It also gives us another competition to play for, and a chance to give other players more game time.”